【Wide Compatibility】 These square film filters, compatible with Tilta compatible with SmallRig Matte Box and filter frames, feature a standard 4"x5.65" size. The matte box ND filters seamlessly integrate with existing photography gear, offering flexibility and precise control over light and color. Ideal for photographers and videographers seeking versatile tools to achieve desired visual effects | 【Flexible Light Control】 ND0.9 is for medium light ambience with 3 stops of light reduction and 12.5% light transmission; ND1.8 is for bright ambience with 6 stops of light reduction and 1.56% light transmission. These ND filters reduce the amount of light entering the lens for effective control of shutter speed and aperture, which avoids overexposure and balances the image exposure for the desired depth of field effect or motion blur effect | 【High Quality Optical Glass】 NEEWER 4x5.65" ND filters are made of high definition optical glass, which is precision CNC machined and polished on both sides to provide superior image quality. The camera lens neutral density filters are high definition without compromising image quality or color casting, making these photograph filters suitable for 4K and 8K video recording and meeting the needs of professional photography and videography | 【Multi Protective Coating】 The surface of the ND filters is coated with a double sided multi layer coating, featuring anti scratch, oil, and fingerprint resistance. Effectively reduces reflectivity to 0.2%, reduces glare and dark corners, improves image contrast and detail performance, and makes every photo clearer and sharper | 【Lightweight and Portable】 The slim design of the NEEWER ND filters adds a little weight when mounted. The included pouch provides extra protection for the filter, making it easy to carry on the go and ensuring that the filter is always in tip top condition